계산기

package com.example.Math;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
 
public class MainActivity extends AppCompatActivity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
 
    public void addClick(View v){
        EditText number1 = (EditText)findViewById(R.id.Number1);
        EditText number2 = (EditText)findViewById(R.id.Number2);
        TextView result = (TextView)findViewById(R.id.result);
 
        int n1 = Integer.parseInt(number1.getText().toString());
        int n2 = Integer.parseInt(number2.getText().toString());
 
        result.setText(Integer.toString(n1+n2));
    }
 
    public void subtractClick(View v){
        EditText number1 = (EditText)findViewById(R.id.Number1);
        EditText number2 = (EditText)findViewById(R.id.Number2);
        TextView result = (TextView)findViewById(R.id.result);
 
        int n1 = Integer.parseInt(number1.getText().toString());
        int n2 = Integer.parseInt(number2.getText().toString());
 
        result.setText(Integer.toString(n1-n2));
    }
 
    public void multiplyClick(View v){
        EditText number1 = (EditText)findViewById(R.id.Number1);
        EditText number2 = (EditText)findViewById(R.id.Number2);
        TextView result = (TextView)findViewById(R.id.result);
 
        int n1 = Integer.parseInt(number1.getText().toString());
        int n2 = Integer.parseInt(number2.getText().toString());
 
        result.setText(Integer.toString(n1*n2));
    }
 
    public void divideClick(View v){
        EditText number1 = (EditText)findViewById(R.id.Number1);
        EditText number2 = (EditText)findViewById(R.id.Number2);
        TextView result = (TextView)findViewById(R.id.result);
 
        int n1 = Integer.parseInt(number1.getText().toString());
        int n2 = Integer.parseInt(number2.getText().toString());
 
        result.setText(Integer.toString(n1/n2));
    }
}